His observations of the many varieties of finch birds in the Galapagos Island led him to solidify his theory of natural selection.
It takes a certain amount of training to set up and use, finch said.
Old English finc, from Proto-Germanic *finkiz, *finkjon (cf. Middle Low German and Middle Dutch vinke, Dutch vink, Old High German finco, German Fink), perhaps imitative of the bird's note (cf. Breton pint "chaffinch," Russian penka "wren").